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<table width="100%" summary="page for bronchitis"><tr><td>bronchitis</td><td style="text-align: right;">R Documentation</td></tr></table>

<h2>Chronic bronchitis in a sample of men in Cardiff</h2>

<h3>Description</h3>

<p>The data consist of observations on three variables
for each of 212 men in a sample of Cardiff enumeration districts.
</p>


<h3>Usage</h3>

<pre>bronchitis</pre>


<h3>Format</h3>

<p>A data.frame of 212 obs of 3 variables:
</p>

<dl>
<dt><code>cig</code></dt><dd><p>numeric, the number of cigarettes per day</p>
</dd>
<dt><code>poll</code></dt><dd><p>numeric, the smoke level in the locality</p>
</dd>
<dt><code>r</code></dt><dd><p>integer, 1= respondent suffered from chronic bronchitis</p>
</dd>
<dt><code>rfac</code></dt><dd><p>factor, with levels <code>abs</code> (<code>r</code>=0), and <code>abs</code> (<code>r</code>=0)</p>
</dd>
</dl>



<h3>Note</h3>

<p>See p.224 in SMIR</p>


<h3>Source</h3>

<p>This copy of the dataset was copied from version 0.02 of the <span class="pkg">SMIR</span>
package, which in turn obtained it from Jones (1975).</p>


<h3>References</h3>

<p>Jones, K. (1975), <em>A geographical contribution to the aetiology of
chronic bronchitis</em>, Unpublished BSc dissertation,
University of Southampton. Published in
Wrigley, N. (1976). <em>Introduction to the use of
logit models in geography</em>, Geo.Abstracts Ltd, CATMOG
10, University of East Anglia, Norwich.
</p>
<p>Murray Aitkin, Brian Francis, John Hinde and Ross Darnell (2009). SMIR: Companion to
Statistical Modelling in R (SMIR). Oxford University Press.	
</p>


<h3>Examples</h3>

<pre>
data(bronchit)
</pre>


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